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FPGA board, Mobile device Interfacing

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picko_again

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I have a problem connecting a spartan 3 FPGA board with a mobile device through it's USB port...a spartan 3 starter kit has no USB port for communication so we need to use its RS232 port..and as the mobile device must communicate through USB so we need some kind of a converter in between...
please if anyone faced such a problem or have any idea how to do such communication please say..thanks in advance...
 

banjo

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What you need is a USB host controller. FDTI has recently released a family of chips that do this:

http://www.vinculum.com/

You cannot use an existing USB to serial converter because those converters expect a USB host at the USB end. The cell phone is a USB slave or end-point, not a host.
 
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